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August 25, 2016MMWR Morbidity and Mortality Weekly ReportOpen Access

Notes from the Field: Outbreak of Listeriosis Associated with Consumption of Packaged Salad — United States and Canada, 2015–2016

Julie L. Self Amanda Conrad Steven Stroika Alikeh Jackson Laura Burnworth Jennifer Beal Allison Wellman Kelly A. Jackson Sally Bidol Terri Gerhardt Meghan Hamel Kristyn Franklin Christine Kopko Penelope Kirsch Matthew E. Wise Colin Basler

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Abstract

In September 2015, PulseNet, the national molecular subtyping network for foodborne disease surveillance, identified a cluster of Listeria monocytogenes (Listeria) clinical isolates indistinguishable by two-enzyme pulsed-field gel electrophoresis (PFGE) pattern combination and highly related by whole-genome multilocus sequence typing (wgMLST). A case was defined as isolation of Listeria with the outbreak PFGE pattern and highly related by wgMLST with an isolation date on or after July 5, 2015, the isolate date of the earliest case in this cluster.

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synapsesocial.com/papers/6a20e71776382611e51817bc https://doi.org/10.15585/mmwr.mm6533a6

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